/usr/lib/ghc-doc/hoogle/libghc-yaml-doc.txt is in libghc-yaml-doc 0.8.15.2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-yaml-doc/html/yaml.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-yaml-doc/html/yaml.txt